Why, why did you add "Washing Soda" (soda ash, sodium carbonate)?

Adding stuff you don't have to add, when you are trying to clear the pool, just complicates an already challenging situation! Don't do that again! Add what you must, till the problem is solved, THEN work on tweaking water chemistry!

And, get a K2006 (link in my signature for Amazon) -- "pink" off the chart indicates DPD color match testing, which is NOT reliable at the high chlorine levels needed to clear algae! Get an OTO kit in the meantime.